Gas Station cleanup site — Restorical Research
UNOCAL 6382
12805 1st Ave S, Burien, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1965. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property operated as a service station prior to 1965, when AMOCO constructed a new facility with underground gasoline storage tanks on the site. Unocal subsequently ran the location as Service Station No. 6382, replacing steel product lines in 1981 and all steel USTs in 1984. Cleanup activities have been underway since 1990, including removal of USTs, hydraulic hoists, and petroleum-contaminated soil between 1990 and 1995, and total fluids bailing for liquid-phase hydrocarbon removal from groundwater ongoing since February 1991. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address12805 1st Ave S, Burien, King County
Historical UseGas Station
Est. Operating Since1965
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (liquid-phase hydrocarbons) from leaking USTs in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #8250

Why Historical Insurance Policies May Be Accessible

Pre-1986 Commercial General Liability (CGL) policies were occurrence-based and did not contain an effective pollution exclusion in Washington. If contamination occurred while those policies were active, those historical insurance carriers may still have a legal obligation to fund the cleanup costs, even if the business closed or the property changed hands.

Petroleum contamination at this site originated from underground storage tanks and fuel infrastructure operated continuously from before 1965 through the mid-1980s — well within the era when occurrence-based CGL policies carried no effective pollution exclusion. The LUST incident number dates to 1974, anchoring the contamination origin squarely in the pre-1986 policy window. With remediation costs spanning more than three decades — tank removal, soil excavation, and ongoing groundwater treatment — historical carriers who insured the station's operators during that period may be obligated to recover those expenditures and fund the remaining work.

Restorical's role is to locate viable historical policies, determine whether a successful coverage claim is possible, and assist our clients and their legal counsel to obtain insurance coverage. Restorical then manages the claim, including accounting, to ensure the cleanup is funded in a timely manner.

What We Look For

  • Historical insurance policies (pre-1986)
  • Policy numbers, carrier names, and coverage periods
  • Connection between contamination timing and policy period
  • Evidence linking cleanup obligation to insured activity

What We Deliver

  • Historical Coverage Chart
  • Trigger Analysis & Property/Policy Nexus
  • Coverage strategy with recommendations
  • Insurance funding for your remediation
  • Claims Management & Forensic Accounting

The Restorical Proven Process

Task 1 — Research and Analysis
Restorical searches for viable historical insurance policies, researches the site history, analyzes the contamination impacts, and underwrites potential coverage — including a proprietary trigger analysis. At the end of Task 1, we provide a clear yes or no on whether a successful cost recovery is possible, along with a strategy and recommendation specific to your situation, even if you are not the policyholder.
Task 2 — Coverage and Funding
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim, negotiate and secure insurance coverage. Restorical will manage the ongoing claim process, including accounting to ensure the insurance companies are funding your remediation in a timely manner.

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This analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.